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A kind of flame-retardant and environment-friendly polyurethane material and preparation method thereof

A polyurethane material and environmentally friendly technology, applied in the field of polyurethane materials, can solve the problems affecting the flame retardancy and mechanical properties of polyurethane materials, poor compatibility, difficulty in uniform dispersion of flame retardants and other additives, etc., to avoid migration and rich Set, improve flame retardant performance, improve compatibility and dispersibility

Active Publication Date: 2021-03-30
广东裕泰实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application uses inorganic flame retardants such as melamine cyanurate and antimony trioxide. Although the inorganic flame retardants are halogen-free, they have poor compatibility with the polyurethane polymer matrix, making the flame retardants and other Additives are difficult to disperse uniformly in the polymer matrix, which affects the flame retardancy and mechanical properties of polyurethane materials

Method used

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  • A kind of flame-retardant and environment-friendly polyurethane material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A flame-retardant and environment-friendly polyurethane material, comprising the following raw materials in parts by weight: 50 parts of diphenylmethane diisocyanate, 12 parts of polycaprolactone, 6 parts of flame retardant, and 1 part of modified diatomite;

[0042] Described polyurethane material is prepared by following method:

[0043] The first step is to place the modified diatomite in a beaker, add diphenylmethane diisocyanate and polycaprolactone in sequence, heat to 75°C, and react at a constant temperature for 120 minutes to obtain a prepolymer terminated with isocyanate groups;

[0044] Step 2: Weigh the prepolymer, preheat it to 65°C and carry out vacuum defoaming. After the prepolymer has no bubbles, quickly pour the flame retardant into the prepolymer, and place it in a 75°C water bath for mechanical stirring 2min, pour into the mold, vacuum degassing for 70s, and finally put it into a 120°C oven for 10h to make the polyurethane material.

Embodiment 2

[0046] A flame-retardant and environment-friendly polyurethane material, comprising the following raw materials in parts by weight: 55 parts of diphenylmethane diisocyanate, 13 parts of polycaprolactone, 7 parts of flame retardant, and 1.5 parts of modified diatomite;

[0047] Described polyurethane material is prepared by following method:

[0048] The first step is to place the modified diatomite in a beaker, add diphenylmethane diisocyanate and polycaprolactone in sequence, heat to 78°C, and react at a constant temperature for 135 minutes to obtain a prepolymer terminated with isocyanate groups;

[0049] Step 2: Weigh the prepolymer, preheat it to 68°C and carry out vacuum defoaming. After the prepolymer has no foam, quickly pour the flame retardant into the prepolymer, and place it in a 78°C water bath for mechanical stirring After 2.5 minutes, it was poured into a mold, vacuum defoamed for 75 seconds, and finally placed in an oven at 120° C. for 11 hours to prepare the po...

Embodiment 3

[0051] A flame-retardant and environment-friendly polyurethane material, comprising the following raw materials in parts by weight: 60 parts of diphenylmethane diisocyanate, 15 parts of polycaprolactone, 8 parts of flame retardant, and 2 parts of modified diatomite;

[0052] Described polyurethane material is prepared by following method:

[0053] The first step is to place the modified diatomite in a beaker, add diphenylmethane diisocyanate and polycaprolactone in sequence, heat to 80°C, and react at a constant temperature for 150 minutes to obtain a prepolymer terminated with isocyanate groups;

[0054] Step 2: Weigh the prepolymer, preheat it to 70°C and carry out vacuum defoaming. After the prepolymer has no bubbles, quickly pour the flame retardant into the prepolymer, and place it in a water bath of 80°C for mechanical stirring. After 3 minutes, pour it into a mold, vacuum defoam for 80 seconds, and finally place it in a 120°C oven for 12 hours to prepare the polyurethan...

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Abstract

The invention discloses a flame-retardant environment-friendly polyurethane material, which is prepared from the following raw materials in parts by weight: 50-60 parts of diphenylmethane diisocyanate, 12-15 parts of polycaprolactone, 6-8 parts of a flame retardant and 1-2 parts of modified diatomite. The polyurethane material is prepared by the following method: 1, preparing a polyurethane prepolymer; and 2, performing a reaction on the prepolymer with a flame retardant to obtain the polyurethane material. According to the invention, a self-made flame retardant is used as one of polyurethanecopolymerization raw materials, so that flame retardant molecules are grafted to a polyurethane molecular chain in a chemical bonding manner to form a part of a main chain structure; in addition, themodified diatomite is added into the raw materials, so that the compatibility and dispersity of the polymer in a polymer matrix are improved, and the reinforcing effect is better exerted; the diatomite can play a synergistic effect on the flame retardant, so that the flame retardant property of the polyurethane material is further enhanced; the obtained polyurethane material not only has high comprehensive mechanical properties, but also has greatly improved flame retardancy.

Description

technical field [0001] The invention belongs to the field of polyurethane materials, and in particular relates to a flame-retardant and environment-friendly polyurethane material and a preparation method thereof. Background technique [0002] Polyurethane is a polymer containing a carbamate group in the main chain of a macromolecule called polyurethane. Polyurethane is divided into two categories: polyester polyurethane and polyether polyurethane. Polyurethane has many excellent properties, so it has a wide range of uses. Polyurethane elastomers are used in many fields such as shoe materials, clothing, pipes, films and sheets, cables, automobiles, construction, medicine and health, national defense and sports and leisure. Polyurethane materials are flammable and often produce toxic gases during combustion, resulting in a decrease in the safety of polyurethane. Especially in the construction field, improving the flame retardancy of polyurethane can significantly increase the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/38C08K9/04C08K9/02C08K7/26
CPCC08G18/3889C08G18/4277C08G18/66C08G18/7671C08K7/26C08K9/02C08K9/04
Inventor 刘鉴威
Owner 广东裕泰实业集团有限公司
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